Vibrating retouching-pencil.



C. H. GILBERT.-

VIBRAHNG RETOUCHING PENCIL.

APPLICATION FILED MAR. 19, 1917.

1,245,330 Patented Nov. 6, 1917.

Invenon UNITED STATES PATENT OFFICE,

CALVIN'HUBERT GILBERT, 0F INDEPENDENCE, IOWA, ASSIGNOR OF ONE-HALF Tl)JOSEPH .A. BECHTER, OF INDEPENDENCE, IOWA. Y

VIBRATING RETOUCHING-IPENCIL.

Specification of Letters Patent.

Patented Nov. 6, 1917.

Application filed. Marc 1 917, 56 151110 5 66.

To all whom it may concern.

Be it known that I, CALVIN HUBERT GIL- BERT, a citizen of the UnitedStates of America, and a resident of Independence, Buchanan count, Iowa,have invented con tain new and useful Improvements in VibratingRetouching-Pencils, of which the following is a specification.

My invention relates to improvements in vibrating retouching pencils,and the object of my improvement is to supply such an implement withelectrically actuated means for imparting thereto combined transverseoscillatory and longitudinal vibratory movements. This object I haveaccomplished by the means which are hereinafter described and claimed,and which are illustrated in the accompanying drawing in which thefigure is a representation of my improved vibrating retouching pencil,the operating means, lts housing and part of the pencil container beingshown in central longitudinal section.

I am aware that in devices of this kind, means have been heretoforeemployed for imparting to the pencil transverse oscillatory or vibratorymovements, but it is my purpose to largely increase the efficiency ofsuch an implement by providing special means adapted to give the samelongitudinal vibration for producing a stippling effect while the samemechanism simultaneously imparts to the pencil rapid transversevibrations.

The hollow shaft 1 is provided with a well-known adjustable holdingreceiver 2 for a pencil point 3, and the end of said shaft opposite saidpencil point is mounted in one end of an alined central hollow 11 in aterminal block 4:. A small electromagnet 5, having a straight core 13,is mounted within said hollow 11 and secured to the outer end of theblock 4 by means of a bracket 19. The winding of this electromagnet iselectrically connected by terminals 6 to conducting bodies 7 fixed onopposite sides of the block 4, said bodies having sockets to receiveterminal points 9 of flexible conductors 10, secured by means ofsetscrews 8.

The numeral 14 denotes a small disk- The numeral 16 denotes adome-shaped cover interiorly threaded to removably fit exterior threadson the block 4 and to receive said armature and its carrying spring.Said cover 16 is provided with a central threaded opening in alinementwith said armature and electromagnet, and is adapted to receive thethreaded stem of an adjusting screw 15 whose end bears upon a roundedboss 17 upon the top of said spring immediately above said armature,

When an alternating current is in circuit with said electromagnet thearmature 14, through the interaction of the electromagnet and thereactive tension of the bent spring 12, is caused to rapidly vibrateinto and out of contact with the adjacent end of the core 13, impartingto the latter and to the connected pencil 8 rapid longitudinal vibration which permits the latter to be used for stippling without manualeffort on the part of the operator.

Since the bent spring 12 is secured upon the block at to one side ofsaid electromagnet, when the armature 1A is thus brought into rapidvibration and contact with the core of the electromagnet, the springexercises a lateral pull upon the armature which causes the armature tomake its impacts upon the magnet core with glancing blows thustransmitting through the spring to the pencil holder simultaneoustransverse vibration, so that the pencil may be used in retouching to dostippling while at the same time making minute wave marks which rendersit peculiarly efiective in the retouching of negatives.

Various modifications may be made in the structures of my device withoutdeparting from the principle of this invention.

Having described my invention, what I claim as new, and desire to secureby Letters Patent, is:

1. A vibrating retouching pencil, comprising a pencil, and a resilienttapping positioned thereover and connected to one side thereof adaptedto jar it obliquely, oscillate it transversely and longitudinallysimultaneously.

2. A vibrating retouching pencil, comprising a pencil, and meansconnected thereto adapted to oscillate it transversely andlongitudinally simultaneously, consisting of an electromagnet mounted onthe pencil, and an armature resiliently supported to one side Copies ofthis patent may be obtained for pole of said electromagnet, saidarmature being mounted on a plate-spring su ported at one side of theelectroma net, and means for adjusting the tension 0 said spring toposition the armature at varying distances 15 from the pole of saidelectromagnet.

Signed at Waterloo, Iowa, this 1st day of March, 1917.

CALVIN HUBERT GILBERT.

five cents each, by addressing the Commissioner of Yatents.

Washington, D. 0.

